package com.youwu.weather.service;

import java.io.IOException;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.logging.LogManager;

import com.youwu.weather.vo.HeWeather6;
import com.youwu.weather.vo.WeatherResponse;
import com.youwu.weather.vo.WeatherType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * WeatherDataService 实现.
 */
@Service
public class WeatherDataServiceImpl implements WeatherDataService {

	private static Logger logger = LoggerFactory.getLogger(WeatherDataServiceImpl.class);
	private static final String WEATHER_URI = "https://free-api.heweather.net/s6/weather/";
	private static final String KEY = "1fba98d5c3954585a4571eb4d1c179ae";
	private static final long TIME_OUT = 1800L;

	@Autowired
	private RestTemplate restTemplate;
	@Autowired
	private StringRedisTemplate stringRedisTemplate;
	
	@Override
	public WeatherResponse getDataByCityName(WeatherType weatherType, String cityName) {
		String uri = WEATHER_URI + weatherType.type + "?location=" + cityName + "&key=" + KEY;
		return this.doGetWeahter(uri);
	}
	
	private WeatherResponse doGetWeahter(String uri) {
		String key = uri;
		String strBody = null;
		ValueOperations<String, String> ops = stringRedisTemplate.opsForValue();
		// 先查缓存，缓存有取缓存数据
		if (stringRedisTemplate.hasKey(key)) {
			logger.info("have data");
			strBody = ops.get(key);
		} else {
			logger.info("don't have data");
			// 缓存没有，再调用服务接口获取数据，并将数据加入到缓存中
			ResponseEntity<String> respString = restTemplate.getForEntity(uri, String.class);

			if (respString.getStatusCodeValue() == 200) {
				strBody = respString.getBody();
			}

			// 数据写入缓存中
			ops.set(key, strBody, TIME_OUT, TimeUnit.SECONDS);
		}

		ObjectMapper mapper = new ObjectMapper();
		WeatherResponse resp = null;

		try {
			resp = mapper.readValue(strBody, WeatherResponse.class);
		} catch (IOException e) {
			logger.info("Exception");
		}
		return resp;
	}

}
